// app.js
App({
    onLaunch() {
        // 展示本地存储能力
        const logs = wx.getStorageSync('logs') || []
        logs.unshift(Date.now())
        wx.setStorageSync('logs', logs)

        const phoneInfo = wx.getSystemInfoSync()
        this.globalData.screenWidth = phoneInfo.screenWidth
        this.globalData.screenHeight = phoneInfo.screenHeight
        this.globalData.statusBarHeight = phoneInfo.statusBarHeight

        // 登录
        wx.login({
            success: res => {
                // 发送 res.code 到后台换取 openId, sessionKey, unionId
            }
        })
    },
    globalData: {
        userInfo: null,
        screenWidth: 0,
        screenHeight: 0,
        statusBarHeight: 0,
        navBarHeight: 44
    }
})